UFO Sighting Report - USA

September 1987 : Yankton, South Dakota

Location of Sighting: Yankton, South Dakota YC Campus Observatory Hill.
Number of witnesses: 8
Number of objects: 1
Shape of objects: Triangular.

Full Description of event/sighting: This happened during an astronomy class field trip to a local observatory to view what planets were visible. We counted how many rings we could see around Saturn and moons around Jupiter etc. Once I finished I was outside of the observatory on Observatory Hill above Douglas Ave. There were possibly 10 or more people outside including the teacher. As we were all chatting suddenly most of us fell silent as a triangular shaped object became visible to the southwest of us. There were no discernable features, however, as the object appeared to be transparent and mirage-like, distorting the clear sky behind it. There were no lights coming from the object.

Yankton is a small town so it was not bright and the sky was as clear as can be. The object was at an altitude of around 200 feet traveling from south to north and completely silent. Unless it was farther away than I thought, it wasn't a large object. My impression was that is was probably the same size as a private jet give or take I had never seen a mirage flying through the sky before or seen one since so I don't have much experience judging dimensions in such a situation. The object continued in a straight flight path moving north till it was out of sight. The entire sighting lasted about 5 to 7 seconds. I have also reported this on the NUFORC site. I was a senior in high school at the time not a junior as I mistakenly stated on NUFORC. I graduated in the spring of '88 this was in the fall of '87. Guess they've made some advances since the Philadelphia Experiment. Feel free to contact me via email.